{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "discover vulnerability", "arguments": ["vulnerability", "discoverer", "capabilities", "vulnerable system", "common vulnerabilities and exposures", "time", "vulnerable system version", "vulnerable system owner", "supported platform"]}], "input": "Google Project Zero researcher Thomas Dullien , aka Halvar Flake , discovered that attackers can trigger a memory - corruption issue in the engine if they can get Windows Defender and other affected security products to scan a specially - crafted file ."}
{"discover vulnerability": [{"vulnerability": "a memory - corruption issue", "discoverer": ["Google Project Zero researcher Thomas Dullien", "aka Halvar Flake"], "capabilities": "NAN", "vulnerable system": "Windows Defender", "common vulnerabilities and exposures": "NAN", "time": "NAN", "vulnerable system version": "NAN", "vulnerable system owner": "NAN", "supported platform": "NAN"}]}